Self-tapping connector

Joints and connections – Member ends joined by inserted section – Section threaded to member

Patent

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Details

403348, 403350, 411418, F16B 700

Patent

active

047705604

ABSTRACT:
A connector for cross-sectionally square, rectangular, hexagonal or other shaped tubes, including a solid cube-shaped block body having tapered arm members extending outwardly from its square sides; each arm having a spiral pipe screw thread therearound intercepted by elongated flutes so that the arm is cross-sectionally Greek cross-shaped with outwardly rib portions between the flutes, so as to be slidably fitted into a square or rectangular tube end or into the end of a hexagonal or other shaped tube with a square insert with the ribs being received in the corners of the square or rectangular tube or of the square insert whereby subsequent rotation of the tube causes the screw thread on the outer side of the ribs to cut an engaging thread on an inner side of the tube, or on the inner side of the square insert.

REFERENCES:
patent: 3532369 (1970-10-01), Reilly
patent: 3645569 (1972-02-01), Reilly
patent: 4111577 (1978-09-01), Kiyosawa

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